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Question

If f is a real valued function defined by f(x)=x3+4x+3, then fins f(1) and f(3).

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Solution

f(x)=x3+4x+3
f(a)=3x2+4---(1)
then
f'(1)=3(1)+4=7
f'(3)=3(a)+4=27+4=31

1211650_1362838_ans_701c0b02213e485a85f5c9ff0d2df292.jpg

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